Invention Grant
- Patent Title: Signal amplification in MRAM during reading, including a pair of complementary transistors connected to an array line
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Application No.: US17061636Application Date: 2020-10-02
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Publication No.: US11386945B2Publication Date: 2022-07-12
- Inventor: Ward Parkinson , James O'Toole , Nathan Franklin , Thomas Trent
- Applicant: SanDisk Technologies LLC
- Applicant Address: US TX Addison
- Assignee: SanDisk Technologies LLC
- Current Assignee: SanDisk Technologies LLC
- Current Assignee Address: US TX Addison
- Agency: Vierra Magen Marcus LLP
- Main IPC: G11C11/16
- IPC: G11C11/16 ; H01L43/02

Abstract:
Apparatuses and techniques are described for reading MRAM memory cells. In a cross-point memory array, each conductive line, such as a bit line or word line, is connected to a transistor pair comprising a pMOSFET in parallel with an nMOSFET. When selecting a memory cell to be read, a voltage of a first conductive line may be pulled up using the pMOSFET while a voltage of a second conductive line is pulled down, e.g., to 0 V, using the nMOSFET. This minimizes a capacitance while the selector is turned on. Further, when reading the selected memory cell, the parallel nMOSFET of the first conductive line may turned on while the pMOSFET is turned off. The nMOSFET provides a higher resistance in place of the decreased resistance of the pMOSFET to amplify a signal at a sense circuit to allow accurate sensing of the voltage across the memory cell.
Public/Granted literature
- US20220108740A1 SIGNAL AMPLIFICATION IN MRAM DURING READING Public/Granted day:2022-04-07
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